1 November 1990 Application of ultrasonic capillary effect in elements of power optics cooled by means of a heat pipe
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Abstract
Development and creation of powerful technological lasers re- quires complex solution of problems of optics, quantum elec- tronics and thermal physics. The achieving of stable in time energetic parameters of technological lasers with cooled ele- ments of power (EPO) and adaptive (EAO) optics can be achieved only by a correct choice of their cooling modes, eliminating or compensating negative effects of heating EPO by laser radia- tion because of principal difference of reflectance of the mir- ror surface from I. The convective regime of EPO or EA0 coo- ling is mainly used in laser technique and carried out by pum- ping the coolant through a penetrable disperse compact heat ex- changer, on the work surface of which a thermally thin layer, separating radiation and the coolant liquid in heat changer, is made /1,2/. The intensity of heat transter and therefore, the degree of thermostatting of the reflecting surface of EPO are determined by a large number of design and technological factors not always reproducible in the EPO manufacturing. Ne- vertheless, for EPO, made on the basis of powder porous struc- tures, the level of removing heat fluxes reach 2 . 10' wt/cm2 under the thermal deformation of the mirror surface less than 1pm, the effective heat transfer factor for a heating mirror surface equal to r%, 105 wt/m2 . °C in this case /2/.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
V. V. Apollonov, "Application of ultrasonic capillary effect in elements of power optics cooled by means of a heat pipe", Proc. SPIE 1438, Laser-Induced Damage in Optical Materials 1989, 14381O (1 November 1990); doi: 10.1117/12.2294469; https://doi.org/10.1117/12.2294469
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